CN114316205A - High-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate and preparation method thereof - Google Patents
High-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate and preparation method thereof Download PDFInfo
- Publication number
- CN114316205A CN114316205A CN202111492872.0A CN202111492872A CN114316205A CN 114316205 A CN114316205 A CN 114316205A CN 202111492872 A CN202111492872 A CN 202111492872A CN 114316205 A CN114316205 A CN 114316205A
- Authority
- CN
- China
- Prior art keywords
- component
- raw materials
- polyurethane
- polyurethane microporous
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a high-strength low-dynamic-static stiffness ratio polyurethane microporous elastic base plate, and belongs to the technical field of microporous polyurethane. The elastic cushion plate is obtained by curing and molding the component A and the component B; the component A consists of PTMEG1000, BDO and H2O, AK7703, BDMAE, T12 and carbon nano-tube; the component B is a pre-NCO with a-NCO value of 12-14 formed by stirring and reacting isocyanate and polytetrahydrofuran ether polyol at 80-100 ℃ in a protective gas atmosphere for 4-6 hA polymer; the molar ratio of active-H contained in the component A to-NCO group contained in the component B is 1.00: 0.98-1.00: 1.03. The method comprises the steps of preheating the component A and the component B, and then pouring, curing and molding. The polyurethane microporous elastic base plate has higher strength, proper static rigidity and lower dynamic-static rigidity ratio, and can meet the use requirement of the common road section of the heavy haul railway on the elastic base plate.
Description
Technical Field
The invention relates to a high-strength low-dynamic-static stiffness ratio polyurethane microporous elastic base plate and a preparation method thereof, belonging to the technical field of microporous polyurethane.
Background
In heavy haul railway, the rubber pad under the rail is the commonly used elastic component in the track structure, plays the important role of damping and reducing noise. Along with the increase of the axle weight and the improvement of the operation speed of a heavy-duty truck, the load borne by the track structure of the heavy-duty railway is continuously increased, the problem that the performance of a rubber base plate is reduced due to crushing, abrasion and easy aging is increasingly prominent, and the safety of truck transportation is seriously threatened. Aiming at the problems, the invention provides a product with excellent vibration damping performance and long service life to prolong the service life of the track component and reduce the on-site maintenance workload and the operation cost, and has great significance.
The polyurethane microporous elastomer combines the excellent wear resistance, fatigue resistance and water resistance of the polyurethane elastomer with the excellent vibration isolation and vibration reduction performance, and is widely applied to the field of rail transit. However, the mechanical properties of the polyurethane microporous elastic base plate for the current rail transit are generally not high, and the tensile strength is generally lower than 6 MPa. The strong hydrogen bond effect exists between the soft section and the hard section of the polyurethane microporous elastomer, the more hydrogen bonds are, the stronger the intermolecular force is, the strength of the polyurethane microporous elastomer can be effectively improved, but the rigidity of the polyurethane microporous elastomer can be correspondingly improved, the too high rigidity can cause the polyurethane microporous elastomer to lose the vibration reduction effect, and the requirements of the common road section of the heavy haul railway on high strength, proper rigidity and low dynamic-static rigidity ratio of the vibration reduction cushion plate under the rail can not be easily met.
Disclosure of Invention
In view of the above, the invention aims to provide a polyurethane microporous elastic cushion plate with high strength and low dynamic-static stiffness ratio and a preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a high-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate is formed by curing and molding a component A and a component B, and the density of the elastic base plate is 880kg/m3～900kg/m3The polyurethane microporous elastic base plate has the tensile strength of more than or equal to 12MPa, the static rigidity of 68-92 kN/mm and the dynamic-static rigidity ratio of less than 1.35;
the component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the polyether polyol is polytetrahydrofuran ether glycol (PTMEG1000) with the molecular weight of 1000;
the foam stabilizer is AK7703 available from Jiangsu Maisrd;
the diameter of the carbon nano tube is 10-20 nm, and the length of the carbon nano tube is 5-15 mu m;
the component B is a prepolymer with-NCO value of 12-14 formed by stirring and reacting isocyanate and polytetrahydrofuran ether polyol for 4-6 h at 80-100 ℃ in a protective gas atmosphere;
the molar ratio of active-H contained in the component A to-NCO group contained in the component B is 1.00: 0.98-1.00: 1.03. Wherein the active-H is active-H and H in-OH of PTMEG1000 and BDO2Sum of active-H in O; the-NCO group contained in the component B refers to the-NCO in a prepolymer formed after the reaction of isocyanate and polytetrahydrofuran ether polyol.
In the component A:
preferably, the components and the mass fractions thereof are as follows, wherein the total mass of the raw materials for preparing the component A is 100 percent:
in the component B:
preferably, the isocyanate is diisocyanate. More preferably, the isocyanate is diphenylmethane diisocyanate (MDI).
Preferably, the polytetrahydrofuran ether polyol is PTMEG 1000.
Preferably, the components and the mass fractions thereof are as follows, wherein the total mass of the raw materials for preparing the component B is 100 percent:
MDI 40％～60％；
PTMEG1000 40％～60％。
preferably, the protective gas is nitrogen or an inert gas.
Preferably, the molar ratio of the active-H contained in the component A to the-NCO group contained in the component B is 1.00: 0.99-1.00: 1.01.
The invention relates to a preparation method of a polyurethane microporous elastic base plate with high strength and low dynamic and static stiffness ratio, which comprises the following steps: the preparation method comprises the steps of uniformly mixing raw materials of the component A to obtain the component A, preheating the component A to 35 +/-2 ℃, preheating the component B to 45 +/-2 ℃, pouring the preheated component A and the preheated component B into a mold preheated to 65 +/-5 ℃ for curing and forming, and obtaining the polyurethane microporous elastic base plate with high strength and low dynamic and static stiffness ratio.
Preferably, the curing and molding temperature is 65 +/-5 ℃ and the time is 10-15 min.
Advantageous effects
The invention provides a high-strength low-dynamic-static stiffness ratio polyurethane microporous elastic base plate, which comprises the steps of firstly, constructing a hydrogen bond grid supermolecular structure by controlling the components and contents of polyether polyol and a chain extender BDO in a component A and the molar ratio of active-H contained in the component A to-NCO group contained in a component B, controlling the optimal hydrogen bonding index, effectively improving the strength of a polyurethane microporous elastomer, simultaneously ensuring that the static stiffness of the polyurethane microporous elastomer is maintained in a proper range, and further obtaining a polyurethane microporous elastomer matrix with matched rigidity and strength. In addition, the invention further adds the carbon nano tube in the component A as a heterogeneous nucleating agent, which can effectively increase the number of generated micropores and simultaneously reduce the size of the micropores, thereby greatly improving the tensile strength of the polyurethane microporous elastomer. For the special formulation of the present invention, the length-diameter ratio of the carbon nanotube must be controlled within a certain range: the length-diameter ratio is too large, the closed porosity is reduced, the strength of the matrix is reduced, and the dynamic and static rigidity ratio is increased; secondly, the content of the carbon nano tube must be strictly controlled within a specific range, and the excessively high content of the carbon nano tube leads to the reduction of the closed porosity of the polyurethane microporous elastomer, the increase of the dynamic and static stiffness ratio and the reduction of the vibration reduction effect.
The density of the invention is 880kg/m3～900kg/m3The tensile strength is greater than or equal to 12MPa, the static stiffness is 68-92 kN/mm, and the dynamic stiffness ratio and the static stiffness ratio are less than 1.35.
Drawings
FIG. 1 shows the carbonyl absorption and peak separation results of the microporous polyurethane elastic backing sheet described in example 1.
Fig. 2 is a graph showing carbonyl absorption and peak separation results of the microporous polyurethane elastic pad described in comparative example 2.
FIG. 3 is a Scanning Electron Microscope (SEM) image of the polyurethane microporous elastic backing sheet described in example 1.
Fig. 4 is an SEM image of the polyurethane microporous elastic pad described in comparative example 1.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
In the following examples: the foam stabilizer is AK7703 available from Jiangsu Meiside company.
The heterogeneous nucleating agent carbon nano tube has the diameter of 10-20 nm and the length of 5-15 mu m.
The Hydrogen Bonding Index (HBI) is the ratio of the area of a hydrogen bonded amino/carbonyl group to the area of the free amino/carbonyl group peak, and the higher the value of HBI, the greater the degree of hydrogen bonding of the polyurethane elastomer. The polyurethane microporous elastic pad samples prepared in the examples and the comparative examples are tested by a Fourier infrared spectrometer, and 1800cm of the spectrum is measured-1～1650cm-1And carrying out Gaussian peak separation treatment on the carbonyl to obtain carbonyl absorption and peak separation results.
Example 1
(1) The component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the diameter of the carbon nano tube is 10-20 nm, and the length of the carbon nano tube is 5-15 mu m;
uniformly mixing the raw materials to obtain a component A;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
mixing the raw materials, and stirring and reacting for 4 hours at 85 ℃ under the nitrogen protection atmosphere to obtain a component B with the-NCO value of 12.56;
(2) according to the active-H in the component A and-NCO group in the component B being 1:1According to the molar ratio, the component A preheated to 35 ℃ and the component B preheated to 45 ℃ are uniformly mixed by a two-component polyurethane casting machine and then are cast into a lockable mold preheated to 65 ℃, the mold can be locked, and the volume in a mold cavity cannot be influenced by material expansion. The volume of the inner cavity is 513cm3The mould of (2) was filled with a total mass of 451.44g of mix. Curing the mold filled with the mixture at 65 deg.C for 10min, expanding and molding the mixture, and filling the mold with molding density of 880kg/m3The polyurethane microporous elastic backing plate.
Fig. 1 shows the carbonyl absorption and peak separation results of the microporous elastic polyurethane backing described in this example, where HBI is 1.73.
Fig. 3 is an SEM image of the microporous polyurethane elastic cushion according to the present embodiment, and the result shows that the microporous polyurethane elastic cushion has a large number of micropores and a small size.
Example 2
(1) The component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the diameter of the carbon nano tube is 10-20 nm, and the length of the carbon nano tube is 5-15 mu m;
uniformly mixing the raw materials to obtain a component A;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
PTMEG1000 50％；
mixing the raw materials, and stirring and reacting for 4 hours at 85 ℃ under the nitrogen protection atmosphere to obtain a component B with the-NCO value of 12.56;
(2) according to the molar ratio of active-H in the component A to-NCO group in the component B being 1:1, the component A preheated to 35 ℃ and the component B preheated to 45 ℃ are uniformly mixed by a two-component polyurethane casting machine and then are cast into a lockable mold preheated to 65 ℃, the mold can be locked, and the volume in a mold cavity cannot be influenced by material expansion. The volume of the inner cavity is 513cm3The mould of (2) was filled with a total mass of 461.7g of mix. Curing the mold filled with the mixture at 65 deg.C for 10min, expanding and molding the mixture, and filling the mold with molding density of 900kg/m3The polyurethane microporous elastic backing plate.
The HBI of the polyurethane microporous elastic backing plate is 1.71.
SEM results of the polyurethane microporous elastic backing plate show that micropores with large quantity and small size are uniformly distributed in the polyurethane microporous elastic backing plate.
Example 3
(1) The component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the diameter of the carbon nano tube is 10-20 nm, and the length of the carbon nano tube is 5-15 mu m;
uniformly mixing the raw materials to obtain a component A;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
PTMEG1000 50％；
mixing the raw materials, and stirring and reacting for 4 hours at 85 ℃ under the nitrogen protection atmosphere to obtain a component B with the-NCO value of 12.56;
(2) according to the mol ratio of active-H in the component A to-NCO group in the component B of 1:1, the component A preheated to 35 ℃ and the component B preheated to 45 ℃ are subjected to double reactionAfter being uniformly mixed, the component polyurethane casting machine is poured into a lockable mold preheated to 65 ℃, the mold can be locked, and the volume in the mold cavity cannot be influenced by material expansion. The volume of the inner cavity is 513cm3The mould of (2) was filled with a total mass of 451.44g of mix. Curing the mold filled with the mixture at 65 deg.C for 10min, expanding and molding the mixture, and filling the mold with molding density of 880kg/m3The polyurethane microporous elastic backing plate.
The HBI of the polyurethane microporous elastic backing plate is 1.75.
SEM results of the polyurethane microporous elastic backing plate show that micropores with large quantity and small size are uniformly distributed in the polyurethane microporous elastic backing plate.
Comparative example 1
(1) The component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
uniformly mixing the raw materials to obtain a component A;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
PTMEG1000 50％；
mixing the raw materials, and stirring and reacting for 4 hours at 85 ℃ under the nitrogen protection atmosphere to obtain a component B with the-NCO value of 12.56;
(2) according to the molar ratio of active-H in the component A to-NCO group in the component B being 1:1, the component A preheated to 35 ℃ and the component B preheated to 45 ℃ are uniformly mixed by a two-component polyurethane casting machine and then are cast into a lockable mold preheated to 65 ℃, the mold can be locked, and the volume in a mold cavity cannot be influenced by material expansion. The volume of the inner cavity is 513cm3The mould of (2) was filled with a total mass of 451.44g of mix. Then injecting the mixtureThe mould is placed at 65 ℃ for solidification for 10min, the mould is filled with the mixture after expansion molding, and the molding density in the mould is 880kg/m3The polyurethane microporous elastic backing plate.
The HBI of the polyurethane microporous elastic backing plate is 1.74.
Fig. 4 is an SEM image of the microporous polyurethane elastic pad according to the comparative example, and the result shows that the size of the micropores in the microporous polyurethane elastic pad is large.
Comparative example 2
(1) The component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the diameter of the carbon nano tube is 10-20 nm, and the length of the carbon nano tube is 5-15 mu m;
uniformly mixing the raw materials to obtain a component A;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
PTMEG1000 50％；
mixing the raw materials, and stirring and reacting for 4 hours at 85 ℃ under the nitrogen protection atmosphere to obtain a component B with the-NCO value of 12.56;
(2) according to the molar ratio of active-H in the component A to-NCO group in the component B being 1:1, the component A preheated to 35 ℃ and the component B preheated to 45 ℃ are uniformly mixed by a two-component polyurethane casting machine and then are cast into a lockable mold preheated to 65 ℃, the mold can be locked, and the volume in a mold cavity cannot be influenced by material expansion. The volume of the inner cavity is 513cm3The mould of (2) was filled with a total mass of 451.44g of mix. Curing the mold filled with the mixture at 65 deg.C for 10min, expanding and molding the mixture, and filling the mold with molding density of 880kg/m3The polyurethane microporous elastic backing plate.
Fig. 2 shows the carbonyl absorption and peak separation results of the microporous polyurethane elastic pad according to the comparative example, wherein HBI is 1.81.
SEM results of the polyurethane microporous elastic backing plate show that micropores with large quantity and small size are uniformly distributed in the polyurethane microporous elastic backing plate.
Comparative example 3
(1) The component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the diameter of the carbon nano tube is 10-20 nm, and the length of the carbon nano tube is 5-15 mu m;
uniformly mixing the raw materials to obtain a component A;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
PTMEG1000 50％；
mixing the raw materials, and stirring and reacting for 4 hours at 85 ℃ under the nitrogen protection atmosphere to obtain a component B with the-NCO value of 12.56;
(2) according to the molar ratio of active-H in the component A to-NCO group in the component B being 1:1, the component A preheated to 35 ℃ and the component B preheated to 45 ℃ are uniformly mixed by a two-component polyurethane casting machine and then are cast into a lockable mold preheated to 65 ℃, the mold can be locked, and the volume in a mold cavity cannot be influenced by material expansion. The volume of the inner cavity is 513cm3The mould of (2) was filled with a total mass of 451.44g of mix. Curing the mold filled with the mixture at 65 deg.C for 10min, expanding and molding the mixture, and filling the mold with molding density of 880kg/m3The polyurethane microporous elastic backing plate.
The HBI of the polyurethane microporous elastic backing plate is 1.70.
Comparative example 4
(1) The component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the diameter of the carbon nano tube is 1-10 nm, and the length of the carbon nano tube is 20-100 mu m;
uniformly mixing the raw materials to obtain a component A;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
PTMEG1000 50％；
mixing the raw materials, and stirring and reacting for 4 hours at 85 ℃ under the nitrogen protection atmosphere to obtain a component B with the-NCO value of 12.56;
(2) according to the molar ratio of active-H in the component A to-NCO group in the component B being 1:1, the component A preheated to 35 ℃ and the component B preheated to 45 ℃ are uniformly mixed by a two-component polyurethane casting machine and then are cast into a lockable mold preheated to 65 ℃, the mold can be locked, and the volume in a mold cavity cannot be influenced by material expansion. The volume of the inner cavity is 513cm3The mould of (2) was filled with a total mass of 451.44g of mix. Curing the mold filled with the mixture at 65 deg.C for 10min, expanding and molding the mixture, and filling the mold with molding density of 880kg/m3The polyurethane microporous elastic backing plate.
The HBI of the polyurethane microporous elastic backing plate is 1.72.
The polyurethane microporous elastic cushion plate prepared in the embodiment and the comparative example is respectively subjected to various performance tests according to the standard Q/CR 479-2015, and the test results are detailed in Table 1; wherein, the density test is referred to GB/T1033.1-2008, the tensile strength and breaking elongation test is referred to GB/T528-2009, the compression set deformation test is referred to GB/T7759-. The test results in table 1 show that the high-strength low-dynamic-static-stiffness-ratio polyurethane elastic base plate prepared in the embodiments 1 to 3 meets the requirements of various performance indexes and meets the use requirements of common sections of heavy haul railways.
TABLE 1
In summary, the invention includes but is not limited to the above embodiments, and any equivalent replacement or local modification made under the spirit and principle of the invention should be considered as being within the protection scope of the invention.
Claims (10)
1. The utility model provides a low sound rigidity ratio polyurethane micropore elastic backing plate of high strength which characterized in that: the elastic cushion plate is obtained by curing and molding the component A and the component B, and the density of the elastic cushion plate is 880kg/m3～900kg/m3The polyurethane microporous elastic base plate has the tensile strength of more than or equal to 12MPa, the static rigidity of 68-92 kN/mm and the dynamic-static rigidity ratio of less than 1.35;
the component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
the polyether polyol is PTMEG 1000;
the foam stabilizer is AK7703 available from Jiangsu Maisrd;
the diameter of the carbon nano tube is 10-20 nm, and the length of the carbon nano tube is 5-15 mu m;
the component B is a prepolymer with-NCO value of 12-14 formed by stirring and reacting isocyanate and polytetrahydrofuran ether polyol for 4-6 h at 80-100 ℃ in a protective gas atmosphere;
the molar ratio of active-H contained in the component A to-NCO groups contained in the component B is 1.00: 0.98-1.00: 1.03.
2. The polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 1, wherein: the component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
3. the polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 1, wherein: in the component B: the polytetrahydrofuran ether polyol is PTMEG 1000.
4. The polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 1, wherein: in the component B: the isocyanate is diisocyanate.
5. The polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 4, wherein: the isocyanate is MDI.
6. The polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 1, wherein: the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
MDI 40％～60％；
PTMEG1000 40％～60％；
the protective gas is nitrogen or inert gas.
7. The polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 1, wherein: the molar ratio of active-H contained in the component A to-NCO group contained in the component B is 1.00: 0.99-1.00: 1.01.
8. The polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 1, wherein: in the component A:
the component A comprises the following raw materials in percentage by mass, based on 100% of the total mass of the raw materials for preparing the component A:
in the component B:
the isocyanate is MDI;
the polytetrahydrofuran ether polyol is PTMEG 1000;
the component B comprises the following raw materials in percentage by mass, based on 100 percent of the total mass of the raw materials for preparing the component B:
MDI 40％～60％；
PTMEG1000 40％～60％；
the protective gas is nitrogen or inert gas;
the molar ratio of active-H contained in the component A to-NCO group contained in the component B is 1.00: 0.99-1.00: 1.01.
9. A preparation method of the polyurethane microporous elastic base plate with high strength and low dynamic and static stiffness ratio as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps: the method comprises the following steps: the preparation method comprises the steps of uniformly mixing raw materials of the component A to obtain the component A, preheating the component A to 35 +/-2 ℃, preheating the component B to 45 +/-2 ℃, pouring the preheated component A and the preheated component B into a mold preheated to 65 +/-5 ℃ for curing and forming, and obtaining the polyurethane microporous elastic base plate with high strength and low dynamic and static stiffness ratio.
10. The method for preparing a polyurethane microporous elastic backing plate with high strength and low dynamic-static stiffness ratio as claimed in claim 9, wherein the method comprises the following steps: the curing and forming temperature is 65 +/-5 ℃ and the time is 10-15 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111492872.0A CN114316205B (en) | 2021-12-08 | 2021-12-08 | High-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111492872.0A CN114316205B (en) | 2021-12-08 | 2021-12-08 | High-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114316205A true CN114316205A (en) | 2022-04-12 |
| CN114316205B CN114316205B (en) | 2023-04-07 |
Family
ID=81050153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111492872.0A Active CN114316205B (en) | 2021-12-08 | 2021-12-08 | High-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114316205B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724981A (en) * | 2009-11-05 | 2010-06-09 | 南京大学 | Method for preparing multi-wall carbon nano-tube loaded thermoplastic polyurethane film |
| US20120083544A1 (en) * | 2010-10-05 | 2012-04-05 | Freudenberg-Nok General Partnership | Reinforced microcellular urethane products |
| WO2016150209A1 (en) * | 2015-03-24 | 2016-09-29 | 江苏兴华胶带股份有限公司 | Polyurethane microporous elastomer for use in high-speed railways and preparation method therefor |
| CN111040612A (en) * | 2019-12-30 | 2020-04-21 | 烟台大学 | Preparation method of carbon nano tube modified light-resistant waterborne polyurethane coating and adhesive |
| CN111087793A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Antibacterial and mildewproof thermoplastic polyurethane composition, foaming bead, preparation method of foaming bead and formed body |
| CN111675896A (en) * | 2020-06-30 | 2020-09-18 | 四川大学 | Method for improving retraction behavior of thermoplastic elastomer microcellular foam material cells |
| CN112063154A (en) * | 2020-08-26 | 2020-12-11 | 东莞市雄林新材料科技股份有限公司 | Microporous repairable TPU (thermoplastic polyurethane) film material and preparation method thereof |
-
2021
- 2021-12-08 CN CN202111492872.0A patent/CN114316205B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724981A (en) * | 2009-11-05 | 2010-06-09 | 南京大学 | Method for preparing multi-wall carbon nano-tube loaded thermoplastic polyurethane film |
| US20120083544A1 (en) * | 2010-10-05 | 2012-04-05 | Freudenberg-Nok General Partnership | Reinforced microcellular urethane products |
| WO2016150209A1 (en) * | 2015-03-24 | 2016-09-29 | 江苏兴华胶带股份有限公司 | Polyurethane microporous elastomer for use in high-speed railways and preparation method therefor |
| CN111087793A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Antibacterial and mildewproof thermoplastic polyurethane composition, foaming bead, preparation method of foaming bead and formed body |
| CN111040612A (en) * | 2019-12-30 | 2020-04-21 | 烟台大学 | Preparation method of carbon nano tube modified light-resistant waterborne polyurethane coating and adhesive |
| CN111675896A (en) * | 2020-06-30 | 2020-09-18 | 四川大学 | Method for improving retraction behavior of thermoplastic elastomer microcellular foam material cells |
| CN112063154A (en) * | 2020-08-26 | 2020-12-11 | 东莞市雄林新材料科技股份有限公司 | Microporous repairable TPU (thermoplastic polyurethane) film material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王鑫;毛昆朋;吴智强;李艳伟;吴绍利: "低动静刚度比的聚氨酯微孔弹性体的研究" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114316205B (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107383322B (en) | Low dynamic and static stiffness ratio polyurethane microporous elastomer composite material for urban rails and preparation method thereof | |
| JP4708251B2 (en) | Foamed polyurethane elastomer, method for producing the same and railroad pad | |
| CN101817957B (en) | Low-lag microcellular rubber material for oscillation reduction of high-speed railway fastener and preparation method thereof | |
| CN105255159B (en) | A kind of height for being used to solidify Roadbed subsidence reparation bonds damping type polyurethane repair material | |
| CN102618038B (en) | Elastic backing board for vibration absorption for railway tracks and manufacturing method of elastic backing board | |
| CN101469084B (en) | Wide temperature zone high damping cushion rubber | |
| EP2576675B1 (en) | Thermoset composite made from engineered recycled rubber powder | |
| CN102250310B (en) | Polyurethane resin composition as well as preparation method and application thereof | |
| CN101381485A (en) | Rubber backing plate of passenger dedicated line | |
| CN113563563B (en) | Low-density fatigue-resistant microporous polyurethane elastic damping pad and preparation method thereof | |
| CN103101399A (en) | Polyurethane airless tire, and manufacturing method and application thereof | |
| CN101921414A (en) | Rubber gasket material for bogie shaft box of rail wagon | |
| CN113307930B (en) | Cold-resistant high-static-stiffness polyurethane microporous elastic base plate | |
| CN113461900B (en) | Low-static-rigidity polyurethane microporous elastic base plate with low-temperature static rigidity change rate | |
| CN114276515B (en) | Polyurethane microporous elastic backing plate with ultrahigh strength and low dynamic and static stiffness ratio and preparation method thereof | |
| CN113307940B (en) | Low-temperature-resistant middle-static-stiffness polyurethane microporous elastic base plate | |
| CN115124693B (en) | Foaming polyurethane elastomer and preparation method and application thereof | |
| CN113512169A (en) | High-density high-bearing fatigue-resistant microporous polyurethane elastic damping pad and preparation method thereof | |
| CN114316205B (en) | High-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate and preparation method thereof | |
| CN114591485A (en) | Polyurethane microporous foam material for railway rail lower base plate and preparation method thereof | |
| WO2016150209A1 (en) | Polyurethane microporous elastomer for use in high-speed railways and preparation method therefor | |
| CN113549193B (en) | WJ-8A type high-speed rail elastic base plate with low static rigidity change rate at low temperature | |
| CN110698625A (en) | Preparation method of viscoelastic microporous elastomer | |
| CN111909344B (en) | Normal-temperature polyurethane elastomer for rails of future urban rail buses, and preparation method and application thereof | |
| CN110552259B (en) | High-elasticity low-density buffer vibration damper and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |